Improvement in pencil-sharpeners



- PENCIL-SHARPENERS. 110,171,110, Patented. Dem-14,1875.

wxt'nessesz Inveniow:

N. PEI'EPS, FHOTO-LITPIOGRAPHER, wAssimaToN. n c.

UNITED STATES PATENT QFFICE.

ISAAC T. DYER, OF STREATOR, ASSIGNOR TO HIMSELF AND VIRGIL T. PRICE, OFCHICAGO, ILLINOIS.

IMPROVEMENT IN PENClL-SHARPENERS.

Specification 'formingvpart of. Letters Patent No. 171,110, datedDecember 14, 1875; application filed June 2, 1875.

To all whom it may concern: Be it known that I, ISAAC T. DYER, of

Streator, in the county of La Salle and State drical case, which isprovided with a corrugated conical sharpener, a thimble for holding anerasing-substance, and a partition for regulating the depth which theerasing-substance extends, the partition being provided with anaperture, whereby the end of a pencil may bear against an elasticsubstance and not be broken or injured, as the whole is hereinafterdescribed and shown.

In the drawings, Figure l is a longitudinal section of my improvement;Fig. 2, a transverse thereof on line 00, Fig. l.

A represents cylindrical case, which is made of metal or other suitablematerial, and provided with a corrugated conical sharpener, C, of suchshape as to give a suitable form to the point of lead or slate pencil.In practice, the corrugated cone C may be made of steel, and placed in'acylinder, A, of brass or White metal, or other non-corrosive material.The end of the cylinder from dotted lines B on its inside may beprovided with a screw-thr ad, to better lTold a pencilpoint in the case.The

partition F is provided with an aperture, 8, by

meansfof which a pencil-point, in being sharpened, may come in contactwith the rubber E, and not be broken and injured. Another function of;the partition is to prevent the rubber from being put into the cylinderA so far as to interfere with the sharpening process. From D to D, inthe inside of the cylinder, is cut a screw-thread, P, for holding theerasing -substancefirmly in place.

In' the drawing, Fig. l, a pencil is in position as when being sharpenedor placed in the case as a protection against injury.

I claim as new The cylindrical case A, provided with a pencil-sharpeningdevice, C, apartition with aperture s, and screw-thread P, forsupporting an eraser, as set forth.

ISAAC T. DYER.

Witnesses:

G. L. CHAPIN, O. H. ADIX.

